Well, I think you answered your own question in the 2nd-to-last paragraph.
My 276/260 combo is neck snapping at about 4k or so, when it kicks in.
Fred
From: "Denis P. Goldman" <[email protected]>
To: "a2 16vGroup" <[email protected]>
Subject: Driving impressions of Autotech Cam set... (long long long)
Date: Tue, 15 May 2001 23:26:41 -0400
Ok, now that I have a few days to play around with the new set, I have
mixed emotions.
Back in the day, my old 1.8 used to be a fast revving fun motor. Lightened
flywheel, euro intake, tt black box, made this motor a lot of fun, but no
power down low. Then I went to a high compression 2008cc motor. Wow.
The low end power of this thing was absolutely sick. Quite a quick car.
That's how the motor was until this weekend....
Now with the new cams in, the motor has turned into a higher revving,
power-up-top engine. This isn't a bad thing, as plenty of low end torque
is still there. But it just doesnt snap your head into the seat at 3000rpm
anymore. Instead, starting at about 2500 on to about 6500, the power is
very steady, and just builds and build and builds. My friend said the
motor feels somewhat like a VTEC now. Now, I am assuming this is due to
the fact that the new camset has a much wilder exhaust cam, with higher
lift, etc. Idle hasn't changed at all by the way. Sounds very much like
stock, and is very steady (not like a 268 on an 8v 2.0l). Anyway, the
thought has even crossed my mind to put the old euro intake back in along
with my stock exhaust cam.
Then there comes the whole idea of cam timing.... I know for sure now
(100% sure) that my cams and my crank are in complete sync with each other.
I avoided that whole part of 'tightening the timing belt and throwing off
your timing' problem. I was thinking I could mess with my cam gear some to
shift the power band down a bit (being as I would like the motor to peak at
6000rpm, not 6500rpm). But I don't even want to mess with the perfect
cam-to-crank timing. Ignition timing is pretty good with little or no
ping, with the compression it still has to be somewhat retarded from stock.
Maybe a degree or two. And my fuel mixture should still be around
2.5-3ma. I haven't checked since last summer, but it shouldn't have
changed (plus I always have the black smoke cloud behind me when I am at
wide open throttle).
Lastly, the car doesn't run so great when cold. I mean, worse that it used
to when cold. Could this be a thermotime sensor or a coolant sensor
problem? Neither have ever been replaced in over 5 1/2 years, but I always
thought they just went bad, with no intermediate stage. I have to run over
the tests in the bentley when I get a chance...
Thanks for listening to my rambles. If anyone has any ideas on where my
low end grunt may have gone, please feel free to let me know. (and don't
tell me its because its a wilder cam set and thats what happens - I know
this) =)
BTW, anyone have shrick 260's with a 2L on the list? How is your power
down low compared to stock? Being that the Autotech cam set and 260's are
somewhat comparable...
Thanks,
Denis G.
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